FORMATING NUMBERS USING DecimalFormat

 DecimalFormat


Using java.text.DecimalFormat class  you can control the display of leading and trailing zeros, prefixes and suffixes, thousand separators, and the decimal   separator.


Example:

package com.selenium;

import java.text.DecimalFormat;

public class DecimalFormatEx {

 public static void main(String[] args) {
  
  /* first parameter - pattern  second parameter - value
   * According to the given pattern 
   */
  
  //acts as a thousand separator - 12,345.343
  formatByPattern("###,###.###",12345.34343);
  
  //here the decimal value is rounding - 123456.79
  formatByPattern("###.##",123456.789);
  
  //adding trailing and leading zeros - 000898.780
  formatByPattern("000000.000",898.78);
  
  //adding prefix $  - $12,345.34
  formatByPattern("$###,###.###",12345.34);  
  
 }

 //a custom method - you can name this method as you wish
 
 private static void formatByPattern(String pattern,double value){
  
  DecimalFormat formater = new DecimalFormat(pattern);
  
  String output = formater.format(value);
  
  System.out.println(output);
 }

}